I wouldn't say cured, but managed to control it in some situations. I still get extreme fear of heights in situations I'm uncomfortable with to the point I freeze, but push myself through it for some situations.
About a decade ago we as a group decided to learn Snowboarding, I'd mostly forgotten how terrified I was of heights as I just generally don't put myself into the wrong situation.
But getting in the first cable car it all came back to me, I had to sit in the middle of the thing, not looking out the windows. Then came the chair lifts, which I mostly got through by closing my eyes and gripping tightly on the bar, for a long time, I hated them. But I really enjoyed the snowboarding part and I just kept putting myself through it, closing my eyes and gripping on for dear life.
It took several seasons of this, but I gradually got more confident with it each and every trip, cable cars came easiest at first, possibly because they're enclosed, the chair lifts took some time, and I still get a bit nervous every time they stop, but I'm feeling pretty safe most of the time and I don't worry about it.
But other aspects of mountains still terrify me, narrow paths next to cliff edges, rope bridges, observation platforms with metal grids for floors, I still feel in some situations. I feel I would still just drop to my knees and crawl away